Seneviratne, P.Nugawela, A.Amaratunge, K.A.G.B.Karunasena, R.P.Wilbert, S.2012-06-252012-06-251997Journal of the Rubber Research Institute of Sri Lanka79pp.31-44https://dl.nsf.gov.lk/handle/1/8925The rubber seed production in wet rubber growing areas in Sri Lanka has gone to very low levels in the recent past affecting the culling process that should be adopted in establishing rootstock nurseries.From the three rubber growing areas studied satisfacton seed production irrespective of the clone was observed only in Kegalle region.Regional differences may be due to direct or influences of the climate and weather during flowering and pod set. Clonal differences seems to be existing in regions where climate or the weather is favourable for spread of diseases.Further RRIC 100 being a resistant clone for oidum and phytopthora.produced a higher percemage of good quality seeds compared with the other two clones.PB 86 and RRIC 121 which have below average tolerance to these two diseases.However currently country as a whole produces enough seeds to fulfill country's annual seed requirement for the production of rootstocks provided the seeds are collected and transported without delayAgricultureHeveaSeed productionClimateDisease incidenceRubberArticle